When the temperature needs to increase, we can hear the motor go to 'kick' in however it stops and doesn't start. This has happened spasmodically over the past month and after a few hours it seems to kick in OK.

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Do you mean it runs for 1 or 2 seconds and stops or it runs for minutes and stops? If it never really starts (runs for a second or less) then it is probably a capacitor start motor and the capacity has gone bad.

If it runs for minutes or more and then stops and subsequently restarts when it has cooled then the thermal overload switch is turning it off when the motor overheats. If the unit is not all that old, hasn't been run particularly hard and you have this problem every time you turn it on when it is just pumping up, (which is to say, there is no good reason for the motor to be overheated) then the thermal overheat switch is probably defective.

If the compressor is being run hard when this happens, then the unit is being overheated from heavier use than for which it was designed. If the interior of the compressor motor has a coating of saw dust or dust, it acts like an insulator and results in the motor heating more quickly than it should under normal circumstances. Also, if it is being used in a hot environment it will likewise have trouble cooling.

So, if it really doesn't run at all, it is probably the motor starting capacitor. If it happens when the compressor isn't really hot, then the thermal over-temperature switch is probably defective. If it gets genuinely hot, but without being run hard, then the motor might need to be cleaned because it is not cooling properly. If it happens when it is hot and it is hot because it has been run hard, then either don't run it as hard, cool it better or get a bigger compressor. If it is clean inside, not being run hard but still overheats, then I would look at a malfunction in the compressor portion of the unit having more friction than it should (bearings lubricated?) thus requiring more horsepower to run the compressor than the motor is designed to generate and results in overheating. Low voltage can also do the same.

Well, by the details, you quoted, it seems, either the main power supply is loose and needs to be tightened up. Also, do make sure, that the compressor run Capacitor is working properly, is not leaked or faulty or loosely connected. Moreover, there is a possibility that the thermostat unit (That controls the switching of the compressor/ heater and other temperature details) is not working properly and kicking the compressor frequently. Hope, now you got a wider picture of the possibilities, you need to start with. Feel free to ask, more details, or any question regarding the query. Hope to hear from you Soon..

can you help me to resolve it. the model #596.52673200 Kenmore made. I replaced the defrost thermostat years ago. It works after that, now it has stopped working. I replaced another defrost thermostat and pull my refrigerator away from the wall, after it works, I push back to the wall where it was, it stopped working.

Finally, I turned the thermostat off for an hours and back on, then it works again with pull it away from the wall. what is it problem?it will stop again. on and off. can you explain the possibility?thanks

Cooling Fan Malfunction. Your radiator fans are most likely not working. That's why the temperature is OK when you're driving full speed and the wind is cooling your radiator. You need to check and/or replace your cooling switch module and radiator fans (most likely it's the cooling module). If you were sitting idle or in stop-n-go traffic for an extended period of time, your car WOULD overheat because the fans aren't kicking in cooling your radiator - then you would see all of the cooling system water spill out of the coolant reservoir, before this would happen your temperature gauge would go to the red and the digital dislpay would flash a thermometer (indicating you're about to overheat in 2 mintues). I hope this helps someone out there - Yes, it happened to me in the middle of nowhere.